text: /*
   * Copyright (c) 2016 Intel Corporation
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  /**
   * @file
   * @brief Kernel event logger support for Nios II
   */
  
  #ifndef __KERNEL_EVENT_LOGGER_ARCH_H__
  #define __KERNEL_EVENT_LOGGER_ARCH_H__
  
  #include <arch/cpu.h>
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /**
   * @brief Get the identification of the current interrupt.
   *
   * This routine obtain the key of the interrupt that is currently processed
   * if it is called from a ISR context.
   *
   * @return The key of the interrupt that is currently being processed.
   */
  static inline int _sys_current_irq_key_get(void)
  {
  	uint32_t ipending;
  
  	ipending = _nios2_creg_read(NIOS2_CR_IPENDING);
  	return find_lsb_set(ipending) - 1;
  }
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* __KERNEL_EVENT_LOGGER_ARCH_H__ */
  